Answer:
Step-by-step explanation:
Given
Recursive:
Required
Determine the formula
Substitute 2 for n to determine
Substitute
Next is to determine the common difference, d;
The nth term of an arithmetic sequence is calculated as
Substitute and
Hence, the nth term of the sequence can be calculated using
Answer:
y = 26.3x² - 116.9x + 109.6
Step-by-step explanation:
Given the data ;
Year Period Users (Millions)
2004 1 1
2005 2 5
2006 3 11
2007 4 58
2008 5 145
2009 6 359
2010 7 607
2011 8 846
A quadratic regression model can be obtained using a quadratic regression calculator ; The quadratic regression modeled obtained is in the form :
y = Ax² + Bx + C
y = 26.3x² - 116.9x + 109.6
